control-unit

control unit

noun Computers.
1.
the part of a CPU that interprets the instructions in programs and directs the operation of the entire system.
2.
controller ( def 5 ).

Origin:
1960–65

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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Control-unit is always a great word to know.
So is doohickey. Does it mean:
a scrap or morsel of food left at a meal.
a gadget; dingus; thingumbob.
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